The Best AI Guardrail Software in 2026
We researched AI guardrail software through official websites, including pricing pages, plan tables, and product documentation. Products are ranked on their core runtime safety job, value for money, and verified features, helping teams compare controls for AI applications and agents.
Our top picks
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Top ranked
Enkrypt AI Guardrails#1 of 239.4/10Broad runtime controls for teams securing production AI systems.
Free plan
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Runner-up
VotalAI#2 of 239.2/10Broad hybrid guardrails for prompts, agents, data, tools, and audit workflows.
Pricing on request · 30-day trial
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Top-ranked free plan
Splunk Guardrails#8 of 238.3/10A framework-agnostic control plane for evaluating and blocking risky agent actions.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 23 tools, best first
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Best forTeams needing broad production guardrails
Broad runtime controls for teams securing production AI systems.
- Jailbreak detection
- Prompt injection defense
- PII detection
9.4/10★★★★★Visit Enkrypt AI -
Best forOrganizations wanting broad hybrid protection
Broad hybrid guardrails for prompts, agents, data, tools, and audit workflows.
Pricing on request · 30-day trial Our VotalAI verdict → Visit VotalAIFor vendors Sponsor this spot · #2 · $99/mo →9.2/10★★★★★Visit VotalAI -
Best forOpenAI-oriented teams needing customizable checks
A flexible, OpenAI-focused guardrail framework for validating LLM workflows.
- Jailbreak detection
- Prompt injection defense
- PII detection
9.0/10★★★★☆Visit site -
Best forTeams wanting open-source, flexible guardrails
A flexible open-source framework for checking LLM inputs, outputs, and application risks.
8.8/10★★★★☆Visit Guardrails AI -
Best forDevelopers building self-hosted AI controls
A broad self-hosted toolkit for developers enforcing AI policies across application flows.
8.7/10★★★★☆Visit NVIDIA -
Best forAWS-centered teams needing extensive controls
A broad AWS guardrail layer for teams that need detailed AI content controls.
8.6/10★★★★☆Visit AWS -
Best forSecurity teams monitoring AI runtime activity
A security-focused runtime layer for monitoring and controlling production AI activity.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.4/10★★★★☆Visit HiddenLayer -
Best forFramework-agnostic enterprise agent governance
A framework-agnostic control plane for evaluating and blocking risky agent actions.
- Prompt injection defense
- PII detection
- Custom policies
8.3/10★★★★☆Visit Splunk -
Best forTeams needing affordable runtime evaluation
Affordable runtime evaluation with policy enforcement, detection, and gateway integrations.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.2/10★★★★☆Visit Fiddler -
Best forTeams wanting free runtime safety enforcement
Runtime inspection and enforcement for teams protecting production AI applications.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.1/10★★★★☆Visit Openlayer -
Best forTeams wanting a low-cost API guardrail layer
A low-cost API guardrail layer covering content risks, agent tools, data protection, and audits.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.0/10★★★★☆Explore Pangea AI -
Best forEnterprises protecting agents and tool calls
A broad runtime guardrail layer for enterprises securing agents and tool calls.
7.9/10★★★★☆Visit Check Point -
Best forSmall teams wanting inexpensive policy enforcement
Affordable runtime guardrails for teams monitoring agent actions, data, and tool calls.
- Prompt injection defense
- PII detection
- Custom policies
7.8/10★★★★☆Visit OpenGuardrails -
Best forDevelopers needing a simple prompt firewall
A focused prompt firewall for injection, secrets, PII, and policy enforcement.
- Jailbreak detection
- Prompt injection defense
- PII detection
7.7/10★★★★☆Visit OpenSecureAI -
Best forTeams focused on AI red-team testing
A strong fit for AI red-team testing, with broad model coverage and a free entry plan.
7.6/10★★★★☆Visit PromptGuard -
Best forDevelopers wanting open-source scanner services
A focused, self-hosted scanner toolkit for developers securing LLM inputs and outputs.
7.5/10★★★★☆Visit LLM Guard -
Best forAkamai customers adding edge AI protection
Enterprise guardrails for securing AI prompts, responses, data, and model access.
7.4/10★★★★☆Visit Akamai -
Best forTeams wanting no-code LLM firewall deployment
A cloud LLM firewall for inline prompt, response, privacy, and policy controls.
- Jailbreak detection
- Prompt injection defense
- PII detection
7.3/10★★★★☆Visit Radware -
Best forSecurity researchers evaluating cyber risks
A broad self-hosted test suite for measuring cybersecurity risks in LLMs.
6.8/10★★★☆☆Visit CyberSecEval -
Best forTeams focused specifically on PII protection
A focused, configurable PII privacy layer for self-hosted LLM applications.
- PII detection
- Custom policies
6.5/10★★★☆☆Visit PII Firewall -
Best forTeams securing secrets behind AI applications
A focused secrets manager for securing credentials behind AI applications.
6.1/10★★★☆☆Visit Google Cloud -
Best forTeams needing custom synthetic voice safety controls
A professional voice synthesis platform for controlled custom voice creation and deployment.
5.5/10★★★☆☆Visit Microsoft -
Best forTeams securing authenticator-based sign-ins
A focused authenticator for offline OTPs and push-based sign-in approvals.
5.2/10★★★☆☆Visit Oracle
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Score |
|---|---|---|---|---|
| 1 | Enkrypt AI Guardrails | Yes | $134/mo | 9.4 |
| 2 | VotalAI | 9.2 | ||
| 3 | OpenAI Guardrails | Free | 9.0 | |
| 4 | Guardrails AI | Free | 8.8 | |
| 5 | NVIDIA NeMo Guardrails | Free | 8.7 | |
| 6 | Amazon Bedrock Guardrails | No | $0.00075/unit usage-based | 8.6 |
| 7 | HiddenLayer AI Runtime Security | 8.4 | ||
| 8 | Splunk Guardrails | Yes | $100/unit/mo | 8.3 |
| 9 | Fiddler Guardrails | Yes | $0.002/unit usage-based | 8.2 |
| 10 | Openlayer Guardrails | Yes | 8.1 | |
| 11 | Pangea AI Guard | Yes | 8.0 | |
| 12 | Check Point AI Guardrails | 7.9 | ||
| 13 | OpenGuardrails | No | $10/mo | 7.8 |
| 14 | OpenSecureAI Prompt Firewall | Yes | $49/mo | 7.7 |
| 15 | PromptGuard | Yes | $19/seat/mo | 7.6 |
| 16 | LLM Guard | Free | 7.5 | |
| 17 | Akamai Firewall for AI | 7.4 | ||
| 18 | Radware LLM Firewall | 7.3 | ||
| 19 | CyberSecEval | Yes | Free | 6.8 |
| 20 | PII Firewall | Free | 6.5 | |
| 21 | Google Cloud Secret Manager | Yes | $0.03/unit/mo | 6.1 |
| 22 | Microsoft Custom Neural Voice | 5.5 | ||
| 23 | Oracle Mobile Authenticator | Yes | Free | 5.2 |
Head-to-head All 28 comparisons →
- Enkrypt AI Guardrails vs VotalAI
- Enkrypt AI Guardrails vs OpenAI Guardrails
- Enkrypt AI Guardrails vs Guardrails AI
- Enkrypt AI Guardrails vs NVIDIA NeMo Guardrails
- Enkrypt AI Guardrails vs Amazon Bedrock Guardrails
- Enkrypt AI Guardrails vs HiddenLayer AI Runtime Security
- Enkrypt AI Guardrails vs Splunk Guardrails
- VotalAI vs OpenAI Guardrails
- VotalAI vs Guardrails AI
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How we rank AI guardrail software
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update